This gives them a rigid structure. Supports and strengthens cell? Cell membrane Selectively permeable double layer of lipid and protein molecules? All cell types ? Fluid enclosed by the cell ...

Transport across membranes All cells are enclosed by a cell membrane, which is selectively permeable. Molecules can move into or out of cells by diffusion and active transport. Cells can gain or ...

The shape and morphology of a cell play a key role ... for controlling the shape and permeability of lipid membranes in synthetic cells. These membranes are made up of lipid bilayers that enclose an ...